fix: change fallback download path to be an s3 link which includes a …

…few packages

Reasonably enough I guess, it appears that a number of our dependencies block github runner IP addresses? the blobs stored at the s3 link were downloadable from the normal location when accessed locally, but returned a 404 from github runners. These blobs were also not present in the bitcoincore depends-sources anyhow.

depends/Makefile

@@ -41,7 +41,7 @@ NO_ZMQ ?=
 NO_UPNP ?=
 NO_NATPMP ?=
 MULTIPROCESS ?=
-FALLBACK_DOWNLOAD_PATH ?= https://bitcoincore.org/depends-sources
+FALLBACK_DOWNLOAD_PATH ?= http://dash-depends-sources.s3-website-us-west-2.amazonaws.com
 
 BUILD = $(shell ./config.guess)
 HOST ?= $(BUILD)